What’s Vulnerable › Vulnerabilities

CVE-2026-55629: Whistle: Path traversal

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-16 · updated 2026-10-24
• Weakness: CWE-22

Description

Whistle is an HTTP, HTTP2, HTTPS, and WebSocket debugging proxy. Prior to 2.10.3, lib/service/service.js handles GET /cgi-bin/temp/get by reading req.query.filename, joining it to TEMP_FILES_PATH only when it matches the temporary file pattern, and otherwise passing the user-supplied filename directly to getFile, allowing a remote attacker to read arbitrary files such as /etc/passwd. This issue is reported as fixed in version 2.10.3.

Affected products

• avwo whistle: before 2.10.3

References

• http://github.com/avwo/whistle/releases/tag/v2.10.3
• https://github.com/avwo/whistle/commit/777bcf69bae2972aa7138a158c91619185653cf5
• https://github.com/avwo/whistle/security/advisories/GHSA-3vfr-4gwf-qxfp
• https://github.com/avwo/whistle/security/advisories/GHSA-3vfr-4gwf-qxfp

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